Thousands of fans streamed out of Olympic Stadium around twilight once it became clear the track -- 87 percent dirt with a number of switchback-like turns -- was unrunnable.

The qualifying heats were originally scheduled to start at 4 p.m., but an overnight bridge collapse pushed back the start to 5. By that time, a steady downpour was soaking the city. A few drivers tested the track at low speeds but struggled to maintain much traction.

When the rain didn't let up by 8 p.m., the event was called off. Officials from the sanctioning body, the Global Rallycross Championship, were meeting Sunday night to determine whether the race would be made up at a later date. It was set to be the first GRC race contested in Europe.

One of the most famous rally drivers in history, two-time world champion Carlos Sainz, a Spaniard known as "El Matador," was scheduled to make his much-anticipated X Games debut. He would have been joined in the field by XG stalwarts Travis Pastrana, Ken Block, Tanner Foust and Brian Deegan, among a host of others.

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